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Different screening models in quantum cascade lasers are compared by calculating the contribution of intrasubband impurity scattering to the optical linewidth as a function of temperature. We find a strong impact of impurity scattering, which increases substantially with temperature. A simple isotropic bulk screening model works well if the screening length is of the order of or longer than the pe
In particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of quantum chromodynamics (QCD)1. These partons subsequently emit further partons in a process that can be described as a parton shower2, which culminates in the formation of detectab
Cerium-based intermetallics are currently attracting much interest as a possible alternative to existing high-performance magnets containing scarce heavy rare-earth elements. However, the intrinsic magnetic properties of Ce in these systems are poorly understood due to the difficulty of a quantitative description of the Kondo effect, a many-body phenomenon where conduction electrons screen out the
3 juni 2026 11:15 till 12:00 | Exjobbspresentation Aryan Singh och Simon Uwalaka presenterar sitt exjobb Beamforming algorithm development for a Neural Processing Unit (NPU) den 3 juni, i E:3139 Exjobbet genomfördes hos BeammWave AB med Samir Kumar Mishra som industrihandledare, Victor Åberg som akademisk handledare och Erik Larsson examinator.This thesis investigates the development of a digital
https://www.eit.lth.se/evenemang/exjobbspresentation-beamforming-algorithm-development-neural-processing-unit-npu - 2026-10-05
Nobelpriset 2023 Professor Anne L’Huillier, vid avdelningen för atomfysik på fysiska institutionen, belönades med Nobelpriset i fysik 2023 tillsammans med Pierre Agostini och Ferenc Krausz för deras experiment som gett mänskligheten nya verktyg för att utforska elektronernas värld inuti atomer och molekyler.Mer om Nobelpriset och Anne L´Hullier på LTH:s webbplats. Våra forskningsavdelningar Astrof
https://www.fysik.lu.se/forskning - 2026-10-05
16 oktober 2025 14:00 till 15:00 | Seminarium Seminar given by Axl Eriksson, doctoral student at the Division of Chemical PhysicsWith some nanomaterials, a bit of light, and a pinch of potential, Axl turns water into hydrogen and oxygen gas (this is called water splitting). Nanomaterials can show some peculiar light-matter interactions, and with his setup, Axl relates these interactions to catalyt
Actigraf Matdagbok Tånaglar Blodprov Mjölktand Urin- och avföringsprover Intervju och Frågeformulär Näsprov Vattenprov
https://www.teddy.lu.se/att-vara-med-i-teddy/material-som-samlas-till-teddy-studien - 2026-10-05
Fotoreceptorerna - tappar och stavar - i ögats näthinna behövs för vår syn men är mycket sårbara, och sjukdomar kan göra att de degenererar och dör, vilket ger svår synnedsättning eller blindhet. En sådan sjukdom är Retinitis pigmentosa (RP), som drabbar ungefär 1 på 3000-4000 personer. RP-sjukdomen är ärftlig och beror på genmutationer, men det är oklart hur dessa får fotoreceptorerna att dö och The rod and cone photoreceptors in the retina of the eye are crucial for our vision, but also vulnerable to diseases, which can make them degenerate and die. Such diseases include Retinitis pigmentosa (RP), a heritable disease with a prevalence of about 1 in 3.000 – 4000 people. RP comes from gene mutations but it is not clear how these cause the degeneration and there are no therapies available.
Landfilling in "cells" has become more common in recent years. Different waste streams are guided to different cells, among which the biocell is a landfill designed for biogas production. In this thesis, the dependence of biogas generation on waste composition was investigated. Six 8,000 m3 test cells, with contents ranging from mainly commercial waste to pure domestic waste and equipped with gas
The downscaling of silicon-based structures and proto-devices has now reached the single-atom scale, representing an important milestone for the development of a silicon-based quantum computer. One especially notable platform for atomic-scale device fabrication is the so-called Si:P δ-layer, consisting of an ultra-dense and sharp layer of dopants within a semiconductor host. Whilst several alterna
In this paper, we report on measurements of bremsstrahlung in laser ion acceleration experiments from ultra-thin, polymer-based target foils. The influence of laser polarization on the generated radiation, the maximum achievable proton energy and the total proton number is investigated. A clear benefit in terms of radiation reduction by the use of circular polarized light can be observed. At the s
We present experimental measurements of vacuum ultraviolet light emission processes in a 15-Torr rare-gas medium exposed to a strong 1064-nm laser field. Apart from a small number of lines which correspond to discrete transitions, and a broad continuum emission, we essentially observe the odd harmonics of the laser field, up to very high order. At a 3×1013 W cm-2 laser intensity, the highest-order
MYH9-related platelet disorders are inherited macrothrombocytopenias with additional clinical manifestations including renal failure, hearing loss, pre-senile cataract, and inclusion bodies in leucocytes that are present in different combinations. The MYH9 gene codes for the cytoplasmic contractile protein non-muscular myosin heavy chain IIA, present in several tissues. The bleeding tendency is us
We report on electrical and optical properties of p(+)-i-n(+)photodetectors/solar cells based on square millimeter arrays of InP nanowires (NWs) grown on InP substrates. The study includes a sample series where the p(+)-segment length was varied between 0 and 250 nm, as well as solar cells with 9.3% efficiency with similar design. The electrical data for all devices display clear rectifying behavi
